The series of LED First Project

The series of LED First Project - When learning programming, the first program that should be attempted first is to display the message "Hello World!". In belalajar microcontroller was also there, the first thing to be made is to create a flashing LED lights, LED flashing means that the flip-flop,

LED stands for Light Emiting Diode, namely diode capable of converting electricity into light. As the nature diode, LED lamps have a positive and negative legs. so that
the installation may not be the best, if installed upside down then there will be no current flowing, and the LED will not light up.

Arduino works at a voltage of 5-12 volts with relatively large currents that could decide the LED. So if we want to connect the LED, then we need resistance (resistor) to limit the current into the LED. LED has a working voltage is called the forward voltage (fv) which this voltage is the voltage needed for the LEDs can be lit properly.

Resistor size that can be used is up to 1KΩ 100Ω (Ω read ohm, the unit of resistance / resistance), the greater the value of the resistor, the LED flash will be increasingly dim. In Arduino, the voltage coming out of its pins are 0-5 volts. While the power supply for the Arduino between 5-12 volts. Therefore, the selection of voltage dependent resistors which we will use.

The series of experiments LED

Please make a circuit above with the following steps:

1. Connect the positive foot LED G4 and G3 leg in the negative,
2. After that, connect one resistor on the hole J3 leg, then the other leg into the hole in the first column of right,
3.  Take a jumper cable, then connect J4 hole to hole in the second column from the right,
4. Take jumper cable, plug one hole in the first column to the socket GND on the Arduino board,
5. Take a jumper cable, plug one hole in the second column to the socket on the board Arduino 5V
6. Connect the USB Arduino to your computer / laptop.
7. Congratulations! You've made your first circuit with Arduino. 

If you set it up properly, then the LED will light up. If not, maybe the feet mounted upside down, please repaired.

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